Page 349 of the (printed) pickaxe2 mentions '::' and '.', but doesn't
really suggest which one is best to use.  So I guess it's possibly one
of those "preffered-style" things?

It seems a little bit odd to me to have two ways of doing the same
thing.  Seems best (as was mentioned above) to stick to :: for module
access and . for everything else.  ??